(57) Abstract: The present invention is to automatically adjust the temperature of the chilled water in the chilled water system according to the change of the set temperature of the medium, provides a hot and cold water circulation device for a mold capable of achieving power saving . The flow path provided in the A mold 1, includes a medium circulation system 21 set temperature is circulating a medium for the variable of cold, cold water tank 22, the refrigerator 23, the cold water pump 24, the medium circulating system The temperature control of the medium flowing through the 21, the medium circulation 21 Cold water system 27 to be performed by the supply or supply stop of cold water for In the die for hot and cold water circulation unit 10 including the door, the temperature sensor 2 for detecting the temperature of the medium flowing in the medium circulation system 21 When, the temperature sensor 2 a detection result of the medium temperature by based on the medium when the set temperature of the medium in the circulation system 21 is changed, the temperature sensor 2 is in the cold water tank 22 according to the medium temperature detected the cold water temperature, and the refrigerator 2 3 cooling capacity is one having a cold water temperature control means for follow-up control to optimize.
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